In a conventional computerized transmission, the gears are basically gears -- interlocking, toothed wheels that assist transmit and modify rotary motion and torque. A combination of planetary gears results in all of the various gear ratios that the transmission can deliver, ordinarily 4 forward gears and 1 reverse gear. https://gearboxcvt64186.suomiblog.com/cvt-fundamentals-explained-48015612